diff --git a/include/asm-mips/dec/system.h b/include/asm-mips/dec/system.h
new file mode 100644
index 0000000..78af51f
--- /dev/null
+++ b/include/asm-mips/dec/system.h
@@ -0,0 +1,18 @@
+/*
+ *	include/asm-mips/dec/system.h
+ *
+ *	Generic DECstation/DECsystem bits.
+ *
+ *	Copyright (C) 2005  Maciej W. Rozycki
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ */
+#ifndef __ASM_DEC_SYSTEM_H
+#define __ASM_DEC_SYSTEM_H
+
+extern unsigned long dec_kn_slot_base, dec_kn_slot_size;
+
+#endif /* __ASM_DEC_SYSTEM_H */